Fastening inserting machine



March 26, 1940. H. E. ELLIOTT FASTENING INSERTING MACHINE 3 Sheets-Sheet 2 Filed NOV. 15, 1938 March 26, 1940.

H. E. ELLIOTT v FASTENING INSERTING MACHINE Filed NOV. 15, 1938 3 Sheets-Sheet I5 Patented Mar. 26, 1940 warren STATES FASTENING INSERTING 'MACHINE Harold Ernest Elliott, LeicestenEngland, assign or to United Shoe Machinery, Corporation, Borough of Flemington, N. J'., a corporation of New Jersey Application November 15, 1938, Serial N0. 240,532 In Great Britain January 4,1938

14 Claims.

The present invention relates to fastening inserting machines and is illustrated herein as embodied in'a machine of the general type disclosedin Letters Patent of the United States No.

' 786,190, granted March 28, 1905, on an application filed inzthe name of Louis A. Casgrain.

A machine of the type referred to is adapted to insert fastenings. formed fromshort lengths of wire into work pieces such, for example, as top 15 to clamp the work during the fastening inserting operation. As successive fastenings are inserted the horn is lowered a little to permit feeding of the work and, as the machine comes to rest, the horn is lowered a substantial distance against its spring to permit removal of the work and the introduction of another work piece.

I-leretoi'ore machines of this type have been run at a speed of approximately. 350 revolutions per minute inserting one fastening each revolution. At this speed trouble has arisen on account of breakage and wear of parts and also from the fact that the clutch mechanism of the machine is operating near the limit of its capacity. These difficulties are seriously increased if it is attempted to run the machine at a higher rate of speed, for example, at a speed of 500 revolutions per minute. i

An object of the present invention is to provide an improved machine of the type referred 35 to that will operate satisfactorily at a speed of 500 revolutions per minute.

To the attainment of this object andin accordance with one feature of theinvention, there is provided in a fastening inserting machine, of

the' type under consideration improved power operated mechanism for lowering the horn from its Work clamping position after the last fastening has been driven into the work and while the machine is coming to rest, this lowering action being started considerably earlier in the cycle of the machine than heretofore, thereby providing more time for lowering the horn and putting less strain upon the means which actuates' the horn lowering mechanism. As herein illustrated, the means for actuating the lowering mechanism includes a cam and the portion of the rotation of this cam devoted toactuating the horn lowering mechanism has been substantially increased over previous constructions so that the lowering actionlhastthus. been made more gradual.

In accordance with another feature of the invention, the machine is provided with improved meansfcr causing thegreturn of the work support or horn to work clamping position substantially at the time the machine starts to operate, thereby "5 insuring that the work will be clamped by the horn before the awl descends to pierce-the work. As illustrated, the horn is freed from the control of the=hornlowering mechanism by the release of a latch by which the horn is connected to its lowering mechanism whileithe .machine .is coming to a stop, and upon the release of said latch, a spring returns the horn immediately: to work clamping position. The releasing of the horn, asherein illustrated,- is effected by treadle .15 operated means at the same time that the clutch of the machine is rendered operative, the horn lowering mechanism: itself being returned to its initial position gradually by the cam during a. later portion of the machinev cycle. ,20

' .With the above and other objects and features view, the invention will now be described in connection with the accompanying drawings and will thereafter be pointed out in the claims;

In the drawings: 25

Y machine;

a Fig. 3 is a sectional viewsubstantially' along the line III-411 of Fig.1; 3 p

Fig. 4 is a view showing in front elevation and partly in section certain parts of the machine seen, in 1; and

Fig. Sis a side elevation of a clutch treadle of the machine.

The illustrated machine is providedwith fastening inserting 'instrumentalities comprising i an awl l, awl actuating mechanism shown gen- 40 erally at ;9, and adjustable bya knob H, wire feeding and shearing mechanism (not shown), a driver if, and a work support or horn Hand actuating mechanism therefor, these parts being actuated by, cams or similar means on a main shaft 13 which extends from the frontlto the rear of the machinev On' rotationof themain shaft l3 the following cycleiscompletedz' v The awl I descends to pierce' the work and, while in engagement with the work, moves" to the left, as viewed from the. front of the. ma.- chine, to feed thework. While the awlismoving tothe left, thelhorn H which, during the greater part of the cycle is'pressed upwardlyby' a spring l5v (Fig'rc i), to clamp the work. against atwork the work for feeding, this lowering being due to the operation of the horn actuating mechanism which will be described in more detail hereinafter. As soon as the feeding of the work is completed, the horn H is allowed to rise under the action of the spring l and the awl rises out of the hole in the work and moves toward the right to its inoperative position. During movement of the awl to the right the wire shearing mechanism, to which the wire feeding mechanism has now fed a predetermined length of wire for forming the fastener, operates to shear off the wire and transfer it into a position where it may 'readily be driven into the hole pierced in the work. Finally the driver I2 descends to drive the fastener into the hole pierced by the awl.

The illustrated machine is also equipped with clutch and brake mechanism which is actuated by a clutch treadle I6 (Fig. 5) under the control of the-operator to bring the shaft l3, running at 500 revolutions per minute, to rest in a limited time and in a predetermined angular position, that is, a position whence the cycle just described may be commenced. The nature of the clutch and brake mechanism will be described in more detail hereinafter.

To enable the operator readily to remove work from the machine when the clutch and brake mechanism has brought the shaft l3 to rest, the illustrated machine is provided with horn drop mechanism, whereby, as the machine comes to rest, the horn H is depressed and caused to occupy an abnormally low position, that is, a position lower than any which it occupies during the cycle of the machine so that there will be adequate clearance for removal of the work when the machine is at rest. The horn drop mech anism is so related to the clutch and brake mechanism that the horn H is only moved by the horn drop mechanism into the abnormally low position when the clutch and brake mechanism is operative to stop the machine, the horn drop mechanism at other times being idle. Of the parts above referred to, the awl actuating mechanism and driver actuating mechanism are preferably constructed and arranged in a manner similar to the corresponding mechanisms described in Letters Patent of the United States No. 2,161,858, granted June 13, 1939, on an application filed in my name, while the wire shearing mechanism is preferably arranged in amanner generally similar to that of the corresponding mechanism described in United States Letters Patent No. 2,052,659, granted September 1, 1936, on an application filed in the names of F. Ricks and H. E. Elliott. The wire feed may be effected in any convenient manner, for example,

in the manner described in United States Letters Patent No. 2,011,683, granted August 20, 1935, on an application filed in the names of H. Lane and G. W. Gibson.

The horn drop mechanism comprises a novel combination and. arrangement of parts so devised that the mechanism operates satisfactorily even though the main shaft I3 is rotated at 500 revolutions per minute, these parts being to some degree interrelated with the mechanism for actuating the horn H during the cycle of the machine to release the work for feeding. The mechanism is arranged and operated as follows:

The horn H, as shown in Fig. 1, comprisesan upstanding stem) at the top of which is mounted a rotatable button 2!, the horn being provided at its lower end with a sleeve23which embraces a column or post 25 on which the horn is supported. The sleeve 23 is split vertically and may be secured in any desired position to the column 25 by a clamping handle 2'! to accommodate work pieces of widely differing thicknesses. The column 25 is rectangular in cross section, and is slidable vertically in a supporting slide 29 which is itself arranged to slide in a guideway in the frame or column 33 of the machine, as shown in Fig. 4.

A pair of horn actuating toggle links 35, 31 (Fig. 4) are interposed between the horn column 25 and the supporting slide 29, the link 35 being pivotally connected at its upper end to the horn column 25 and the link 37 being pivotally connected at its lower end to the supporting slide 29. At the center of the toggle the adjacent ends of the links 35, 3'! are pivotally connected to a third link 39, which extends horizontally to the right, as viewed from the front of the machine, and is pivotally connected to an upstanding arm M mounted on a forwardly and rearwardly extending rock shaft 13. The shaft 43 has a second arm 45 secured to it which extends horizontally toward the right and is connected to a toggle actuating rod 41 which extends upwardly and is connected at its upper end to a bell crank lever 49 (Fig. l), the lever 49 being operated by a cam 55. The supporting slide 29 is continually urged upwardly by the horn spring l5 and is connected at its lower end by a rod 56 to the forward end of a balancing lever 52 (Fig. 5) mounted on a pivot 54 which extends laterally'of the machine. The balancing lever 52 extends rearwardly of its pivot 54 and has connected to its rearward end an upwardly extending rod 5| to the top of which is secured a rack plate53, as shown in Fig. 2. The rack plate 53 is capable of vertical sliding movement in a guideway 55 forming a part of the column 33, and it has two rack surfaces with teeth formed thereon, an upper rack 51 on its forward side and a lower rack 59 on its rearward side.

Mounted for engagement with the rack teeth 5'l,-at certain times in the machine cycle, is a pawl 6! which co-operates with the rack surface to insure that the desired movements shall be imparted to the horn H by the toggle links 35,

31. The pawl BI is pivotally mounted at its lower end at 63 upon a pawl carrying lever 65 which extends forwardly approximately horizontally from a transversely extending fixed pivot 61. At its forward end the lever 55 is pivotally connected at 69 to an upper link H of a pair of pawl actuating toggle links ll, 73. The link ll extends downwardly and is pivoted to the lower link 13 which is formed by one arm of a bell crank lever l3, 15 which, in turn, is pivoted upon a transversely extending stud Tl secured to the column 33. The arm 15 of the bell crank lever extends forwardly at right angles to the arm 73 and has connected thereto an upwardlyextending pawl operating rod 19 coupled at its upper end to a cam operated bell crank lever (not shown).

The arrangement of the parts just described in connection with the actuation of the horn H is such that, when the main shaft I3 is running continuously and the horn drop mechanism is not in operation, the rod l! is maintained in a raised position, as shown in Fig; 4, by the cam 50 to maintain the toggle links 35, 31 in a straightened condition during the greater part of the rotation of the shaft 13. During this period the rod'l9is, maintained by its cam (not ailing-sea shownyiin a lowered pcsitiom as shownin- Fig 2,-so':tliat'the' toggle links H, "are in a position where" the toggle is; broken, and thu'sthe forward end of the lever65 is held-in a lowered position. When the-forwar'd endof the'lever 65 is in this lowered position," a suitablysha ped fixed stop 8 I,

' secured to the column-33;-is operative to hold-the slideEQ under the action of the horn 35 pawns: .out oi engagement with the rack teeth 51 by contact with a lug 83 on the pawl. The I horn" spring I may thus thrust the supporting s1ide"'2 9 and thehorn-H upwardly to thrust the horn into 'claznping engagement with the work regardless, within limits, of the thickness of the work. 'Wlien there is no work on the horn H, the horn will occupy thepos'ition shown in Fig. {iwh'ere further upward movement ofthe horn is prevent'eiclby 'contactof a stop 34 secured to the column 25with' the column 33. I

Just before the commencement of the feed of the work by the awl i2, the rod- 19 is elevated by its camlthereby'rockingthe bell crank lever. 13, in a counterclockwise direction, as viewed in Fig. zjstraightening the toggle "M, It, and liftingthe forwardend of the lever 65 sc that the stop Si no longer holds the engagement with therack teeth 57.

becomes operative to move the pawl 6i counter clockwise about its pivot 63 to cause itto engage the rack teeth til." Onengagement with the rack teeth 57 the pawl 65 prevents downward movement of the rack plate 53, and consequently prevents upwardmmovement of the supporting spring i5.

Duringthefeed of the workv by'the awlthe rod 4? is moved downwardly. by the cam 50 so that the toggle 135, 3'! is broken towards the right and the hornH is lowered. stated above, the

machine is so 'arranged'thatthe horn H is lower-ed about of an inch and it will be clear from the foregoing description that, since during the the machine following the operation'upon. low

greater part of the machine cycle, the horn spring l5'is effective to thrust the horn up into clamping engagement with the work, variations inwc rk thickness willmake little or nodiiierence to the amount of Y the lowering movement given to the hornl-I during the-feed of the work by the awl. When, however, work presented to the machine differs greatly in thickness from that previously operated upon, for example, when high wooden heels suitable for womens shoes are presented to heels suitable for mens shoes, the operator will make a corresponding'adjustment in the position of the horn I-I upon the column by means of the handle 2?. The horn drop mechanism will now be described. In'the illustrated machine the horn H descends from its work clamping position to the abnormally low position mentioned above which is a distance of about it; of an inch below said work clamping position although this distance may be varied,as will be explained hereinafter, as

with the rack teeth .59 by a spring pressed plunger 95 carried by the slide 81. When the machine is running continuously, the pawl 89; is

pawl 6i out of i A spring pressed plunger 85,1carried by the lever (55, then 3 held out oren agment with the mate-ah 59 by a carn piec'elit fixed-to the frame of the machine, the slide 87 i being held' ina lowered position against anadjust'able stop 95 by a spring 91 (Fig. 2). The'slide 8'! has connected its upper end at 99 "a connecting rod l0], shown in Figs.

2 and 3, the upper end ofwhich is connected to the left-hand end of a rocking lever Hi3 (Fig.3) The rocking lever I63 is pivoted freely upon a stud I05 which is located below and parallel to the main shaft'ltand is secured in the frame of the machine. The rocking lever H03 is provided with. a slot Ml and the connecting rod Mi is pivoted to a stud 153 which passes through the slot I G? and maybe adjusted along'the slot, so

that tlrle-am.'ount"ofimovement given to the slide 8'5 by melting movement of the lever me maybevaried, thereby varying the abnormally low positi'cn occupied attimes by thehorn H. I

Oneicain HI: (Figs. 1 .and 3) upon the cam shaftl-i constitutes-a horn. drop cam and cooperates with arc-ll l lfi'in'ounted at one end of a cam lever H5 freely piv otedon the stud ind forwardly-of ther'o-cking lever Hi3. Adjacent to the roll H3 the lever HEflhas pivotally connected'thereto at MS a depending double toothed pawl H1 having two depending teeth one above the other. The lowertooth Hit of the pew! ill isadapted, at certain timesQto engage recess at the right-hand end of therocking lever Hill,

as shown Fig. 3, but while the machine is running continuouslythe tooth H9 is held out of engagement with this recess, in a manner to. bedescribed hereinafter, and thee-am lever 1 i5 is oscillated idlyby the cam ill, the double toothed. pawl ll! moving up and down to the right of the recess.- The roll it is held against the 'cam ill by a spring pressed plunger" 92! (Fig. 3) mounted"in'themachine frame.

The uppertootlr I23 of the :pawl H! is adapted to engage a V-shaped groove in a controlling member I25. The controlling member i2? is pivotally mounted on 'a stud it! which extends forwardly -from' a bell crank lever 529 having a lower arm i l'ti and being freely pivoted upon a pin- I33 secured to the machine frame. The stud i2? is engaged in a slot I35 inthe controlling member 425 and the controlling member has mounte'd 'therein a spring pressed plunger it'll which acts uponth'estud l2! and ncrmallyurges thecontrolling member to the left, as viewed in Fig.-3,-so that the stud lzl occupies a position at the right-hand end of the slot 535. Mounted in the bell crank lever I29 isa further spring pressedplunger E39 which acts upon the under I 1 side of the controlling member 325 and urges it upwardlyin a clockwisedirection about the stud 12! to holdthe VnShaPGd groovethercin'against the uppertoothiZS of the pawl i ll. The lefthand side of the V-sha'ped groove in the controlling member lEEis so arranged with regard to theupper tooth 23 that, when the lower tooth H9 is, engaged in the recess in the rockinglever Hi3 and any appreciable stress is being transmitted from thecain H l through the lever H5 and pawl H! to the rocking -lever E63 by the tooth i I 9,. so that it becomes diificult to free the tooth H8"from its recess in the lever Hi3, rocking of the bell crank lever I29, 439 in a clockwise direction, to-smove the controllingmember E25 to the right, from-the position shown in Fig. .3,

where the upper'tooth I23 engages the V-shaped groove in the controlling member i251, causes the left-hand end of the controlling member lactl to dip, against the yieldingcaction H of the; spring pressed plunger I39 acting. on its under side, so that thebottom of the V-shaped groove therein is no longer occupied by the tooth I23. If, however, the stress transmitted through the tooth I it to the rocking lever IIlE-lis reduced until it is inappreciable while the bell crank lever I29, I3I is rocked in the clockwise direction then the spring pressed plunger I39 will cause upward movement of the left-hand end of the controlling member I25 which, in turn, through the cam action of the left-hand side ofthe shaped groove upon the tooth I23, will draw the tooth Hi} out of engagement with the recess in the rocking lever I53 until the tooth I23 occupies the bottom of the V-shaped groove.

The controlling member I25 is, as statedabove, mounted upon a stud I21 secured to the upper arm of the bell-crank lever I29, I3I and the bell crank lever has a horizontally extending arm I3I to which is pivotally connected a downwardly extending rod ML, The lower end of the rod MI is pivotally connected at I45 to a trip lever I43. The trip lever I43 extends widthwise'of the machine and near its center is pivoted upon a forwardly and rearwardly extending stud IQ'L The left-hand portionof the trip lever I43 com-' prises a flat tail I49, Beneath the tail I49 is arranged a vertical trip rod II which passes downwardly througha hole in a rearwardly extending bracket I53 on the frame of the machine. The trip rod I5I is urged downwardly by a spring i555 (Fig. 1) surrounding the rod and confined between a nut I5I threaded on the rod and the bracket I53. At its lower end the trip rod I5I is pivotally connected to the rearward end of the clutch treadle I5 which is pivoted at I54 on the base of the machine and extends forwardly, bearing a tread plate I56 at its forward end. The arrangement is such that depression of the treadle I5 causes the trip rod I5I to rise against the action of the spring I55, to abut against the tail M9 of the trip lever I43, thereby rocking the trip lever in a clockwise direction, as viewed in Fig. 3, and thus causing the bell crank lever E29, I3I, which carries the controlling piece I25, to rock in a clockwise direction to pull the controlling piece toward the on its right-hand side.

right. I

Freely mounted upon a pivot pin I55 (Figs. 1 and 3), which extends rearwardly from a bearing in the head of the machine and is supported in a bearing on the bracket I53, is a brake cam lever I63 carrying at its upper end a roll I 65 (Fig. 3) which engages an enclosed track-formed in the rear side of a brake cam I55 secured to the main shaft I3. Beneath its pivot .pin I59 the cam lever I53 extends downwardly and has a lower portion I81 carryingan abutment I69 The abutment I55 is arranged at certain times to engage a spring pressed slide i'II carried by the trip lever I453, at which times, should the brake cam I65 cause counterclockwise rotation of the lever I53, the trip lever M3 will be urged bodily to the right. Fixed to the pivot pin I59 and depending therefrom is a lever Ill and the stud M'I, upon which the trip lever M3 is pivoted, is carried by the lever I13. The arrangement is such that when the trip lever I43 is pulled bodily to the right, the lever I'i3 is turned counterclockwise about the pivot pin I59. The pivot pin I59 has secured to its rearward end an arm I'I5 (Fig. 1) extending rearwardly and to the left. The arm H5 carries an upwardly extendingV-block Ill. The V-block II'I co-operates with another V- block I19 mounted upon the main shaft I3 in such a way that upward movement of the V- block I'I'I causes engagement of a friction clutch cone I8! rotatablewith the main shaft I3 and a belt pulley I83 freely rotatable upon'the shaft 13, so that the shaft I3 will be driven by the belt pulley I83. Downward movement of the V-block I'll allows the friction clutch to become disengaged. a a I Carried by the lever I13 is a safety handle I85, which is yieldingly retained in one or the other of two positions. In one of these. positions the handle I85 extends downwardly sub stantially vertical and in the other position it extends to the right and substantially horizontal (as shown in Fig. 3), the two positions being separated by about 110. The safety handle I85 is secured to a forwardly and 'rearwardly ex-" tending stub shaft l8! (Figs. 1 and 3) whichat its forward end carries an eccentric pin I89. Thestub shaft I8'I' is mounted for rotation in a boreflin the lever I13 and also for rotation in a bore in a lever Isl secured to the pivot pin I59 (see Fig. l). Journaled upon the pin I89 is one end of a brake rim operating rod I93 the other end of which is connected at I95 to one end of an arcuate brake rim I93, which extends around the periphery of the brake cam I55 and is pivotally mounted upon the pivot pin 59 at its other end. In addition there is mounted upon the eccentric pin E39 a variablestop member I99 which is approximately Y shaped. The stem of the-Y member carries a bearing which surrounds the eccentric pin i89 while the arms 2%, 203 of the Y embrace a forwardly extending part of the stud Mil. The arm 253i of the V at the left of the stud Hill, as viewedin Fig. 3, carries an abutment surface 205 on its left-hand side.

The parts above described are arranged to cooperate in the following manner. When the safety handle I85 is in its horizontally extending position, as shown in Fig. 3, the eccentric pin I38 is approximately below the axis of the stub shaft I8'l, and thus the rod I93 occupies a position more to the right of that which it would occupy, were the pin I89 to the left of the axis of the stub shaft Iill. Furthermore, the mem'- ber I99 then occupies a position where the stud I il, which is below and to the right of the stub shaft IE7, is closely adjacent to the junction of the arms 20!, 283 so that the abutment surface 255 is nearer the axis of the stud I l'I than it would be were the eccentric pin I89 to the left of the axis of the stub shaft IIl'I. Considering the machine to be running continuously, the

safety handle I85 as occupying its horizontally extending position, and the tread plate I55 of the treadle W as being held depressed, this position of the treadle will hold the trip rod I5I in an elevated position and the trip rod I5I, by engagingthe tail Hi5 of the trip lever I43, will hold that lever in a clockwise position, determined by a stop screw 255 which is arranged to engage the under side of the trip lever I43, this position being such that the spring pressed slide I II is maintained below the path of the abutment on the lower part I57 of the brake cam lever 7 53 and in a position where it cannot co-operate with the abutment. When the trip lever M3 is in this clockwise position, the bell crank lever I29, I35, which is connected to the trip lever I43 by the rod MI will, as aforesaid, also occupy a clockwise posit-ion in which the controlling member R25 is moved to the right in Fig. 3 to hold the double toothed pawl Ill out of engagement with therocking lever I53.

a spring 2 connected thereto. The trip. lever I43 beingdirectly connected to the controlling Underthese.conditionsthe brake .cam I66 will oscillate the brake cam lever I63 idly'and the horn drop-cam III will oscillate the cam lever H5 idly. A spring .26! connected between the; frame and part of. the lever I13 will hold the lever I13 ina clockwise position and thus hold the clutchv in engagement and the brake rim, I91 away from the periphery of the brake cam by urging the rod 593 to'the left, as viewedin Fig. 3. The clockwise position'taken by the lever I13 under the action of the spring 201 is limited by engagement of the abutment surface 265 on the member IQQ-With a fixed stop 269, and, since the distance between theabutment surface 265 and the axis of the stud I4] is small (the safety lever liit being inits substantially horizontal position),

the lever IItwill occupy a position ,sufiiciently clockwise to enable the clutch cone It'll ,(Fig. l) toengage the pulley I83 sufficiently to drive the machine, and to allow the brake rim I91 to be freeof theiperiphery of the brake cam I66. When itis desired to stop the machine, the

clutch treadle I6 is released, allowing the .trip rod I5I to descend under the action of its spring I55 so that the,,trip*.lever I43 may rockin a counterclockwise direction, under the action of member I25, doesnot, however, rock inacounterclockwise direetion unless or until the horn drop cam III is so angularly oriented that the cam lever H5 actuated thereby .is so disposed that the controlling member I25 may move to the left, as viewed .in .Fig. 3, vto carrythe double toothed pawl Ii? into-position to engage the recessin the rocking lever I63,.in other words, I

, not be moved to the left as just described, the

"clutch treadle I6 is released and the right-hand right-hand end of the cam lever H5 notbeing'in an upper position. Consequently, when the end of the camleverIIS isin, or reaches, an upper position which allows the trip lever I43 to swingin acounterclockwise direction to move a the pawl H! to the left, the. abutment I69 on the brake cam lever I63 will then be 'at the left of thespringpressed slide I'll, an'dtupon further rotation of the main shaft I3 will bemoved to the right to engage the .ileft-hand side of the spring pressed slide I'II thereby rocking the lever I73 in counterclockwise direction to free the frict ion clutch cone IBLfrom the belt pulley I83 and apply the brake rim I97 to the periphery of the-brake cam Ifiii." In-this wayshould theLma-l chine tend to overrun the desired stopping posi tion the brake cam I66will continue to apply the brake rim I9'i to its own periphery with increasing force. i

The continued rotation of the main shaft I3 I which, inter alia,'allows application of the brake rim I-H'I in the manner described above, also causes I the horn drop cam II E to thrust down the cam lever I I5, and since at this part of the machine cycle, the lowertooth H9 of the pawli IITis in position to engage the recess in the rocking lever I63, such movement of the cam lever H5,

will cause the rocking lever I 03 to rock in. a

clockwise sdirection-to liftthewslide 81 ag ainshthe action of itsspring 91..

Such lifting of the slide. 81;Wi1], withthe clutch treadle IIiFreleased, allow thepawl 89 carried thereon to ride off the cam piece 93rinto engagement withthe rack teeth 59 Ii onthe rackplate I 53,.thereby causing continued upward movement of the slide alto lower, the horn thedesired of an inch through the connection of the rack plate to the balancing lever 52 and throughrthe connection of the latterto the supporting slide 29; The distance the horn is; thus lowered ,may

be raised by adjusting the stud I 69 along theslot 'Iil'i at the leit-ha-ndend of the ro ckinglever I63; mentioned "above, the stopping position of the machine is such that a cycle as described may be started therefrom, this cycle beginning with the piercing oithe workby the ,awl. In order to hold. the work upwardly against the thrust. of the awl during the piercing opera-- tion, it. isdesirable :to have the horn H in an [elevated work clamping position atthetime the awl starts tolpierce the work. Furthermorejit position while thedriveris driving the last fastenof. rotation of the main shaft I3 be foreithe piercing of the work hysthe awl and. approxi-' mately il'l after'thecompletion of theidown- WardIstroke of the driverf About 1 l0of rotation 'are allocated for that portion of the horn drop cam I II which is operative to'cause up ward movement of the slide '81; of these 11'0";the first 10 approximately, are devoted to lifting the slide 8! suificiently to enablethe pawl89to'ride isdesirable-tohave the :hornin work clamping ing. Thestopping position ofthe machine when the shaft I3 is run at" 50 0 revolutionsper minute, has been arranged to be approximatelyl8 ofi. the cam piece toeng age the rack teeth- 5,9...

while the remaininglOOf approximately areused in depressing the horn I-I' against the actiomof the horn spring I5, .the slidelil'l and the rackplate 53 moving upwardly. togethen At the end of such downward'movement of the horn H the ma:

chine comes to rest, so that'the downward movement'of thehornflcommences just as the driver has completed, its downward movement; the,ex'ac t instant at which the horn H cominences to lo wer under theaction of thecam III inth'is manner varies snare, since the pawl 89 mayjustcatch,

orjust miss, a tooth of the rack teeth .59Ithereby making the "horn lowering a little early, or late,

correspondingly. v

On startingthe machine, and before or as the awl starts to pierce the work, the horn H at tains its work clamping position. Inorderjthat the horn H shall return to work clamping posife tion before the awl'startsto pierce the work, on

starting the machine, the clutch treadle I6 is arranged to operate the pawl 89 in thefollowing manner: (it being appreciated that when the machine is at rest the pawl 89 is inengagement with the rack teeth 59 and itself is instrumental in connectingthe slide 81 and'therackplateI53 so that the ,horn H is maintained in {its abnormally low position) Connected to therearward end of thefclutch treadle I6 is a vertically extending, connectingrod 2I3 which isconnected at its upper end .to a rearwardly extending arm '2I5 of apawl releasing lever 2H. The lever 2H, is

pivoted abouta fixedstud 2-I9 extendinglaterah 1y of the machine and has its arm 2|! extending j forwardly .andldownwardly to a point adjacent the pawl 69; The lower end of the arm 2 I1 constitutesa'tail 22I which, when the paw1-89-is in the elevated position it occupies in the stop ,posiwards about a pivot 22'! on the slide 81 under the action of a spring 229 and the tooth 225 falls over the pawl 89 and prevents its reengagement with the rack teeth 59. When the machine is in the stop position and the pawl 89 is in engagement with the rack teeth 59 the tooth 225 of the catch-pawl 2Z3 rests upon the top of the pawl 89, as shown in Fig. 2, and thus is prevented from swinging downwardly under the action of the spring229. As soon as the pawl 89 has been released from-the rack teeth 59 by actuation of the clutch treadle I6 in the manner described, the horn'H moves rapidly upwardly under the action of the horn spring I5 and reaches its upper position within the 18 rotation of the main shaft I3 between the stop position and the I piercing of the work by the awl, the rack plate 53 moving "downwardly. The catch pawl 223 acts to hold the pawl 89 from falling back into engagement with the rack teeth 59 even though the treadle It be released immediately after depression and as the rack plate 53 moves down wardly. I f

In addition to actuation of the lever 2I5, 2H; depression of the clutch 'treadle I6, when the safety handle I85 is in its substantially horizontal position, to raise the trip rod I5! causes the trip lever I43 to rock clockwise, so that the spring pressed slide III carried therebyis tripped out from engagement with the abutment 99 on the lower part I61 of the'brake cam'lever I93 'so thatthe brake cam leverthereafter oscillates I idly. .The lever I13 may then swingfunder the action of the springZIl'I in a clockwise direction to cause engagement of the clutch cone I8! with the belt pulley I83 to drive the machine and to cause the brake rim I91 to be freed from the periphery of the brake cam I96. Clockwise movement of the trip lever I43 will, as before described, rocklthe bell crank lever, I29, I3I to pull the controlling member I25 to the right but,

although the horn spring I5 is no longer acting to cause a thrust to be transmitted through the pawl II'I, the spring 91 which, while the machine is running continuously acts to hold the slide I3! down against its stop 95, is sufficient to cause the double toothed pawl I I! to remain in engagement with'the recess in the rocking lever I93, the upper tooth I23 of the pawl II1 leaving the bottom of the V-shaped groove in the control ling member I25 in the manner described h'ereinbefore. 'As the main shaft rotates, however, the horn drop cam I I I gradually allows the right-hand end of the cam lever II5 to rise, thereby lowering the slide 91. When this slide 8'! touches its stop 95, the spring 91 is rendered idle, and the, thrust transmitted through the double toothed I pawl II "I is reduced sufficiently for the cam action of the V-shaped' groove in the controlling member I25,'acting on the upper tooth I23 of the pawl I I! to remove the lower tooth I I9 of the pawl from the recess in the rocking lever I93,

so that subsequent rotations of the horn dropv cam I II merelyoscillate the cam lever I I5 idly. In this way the horn drop cam III can be arranged to lower the slide 91 slowly.. It is so arranged that 120 of rotation of the horn drop cam III are devoted to lowering the slide 81.

Accordingly, the horn drop cam III isv gently lever I93 and on the part of the track which acts to lift said lever. During lowering of the slide 9? the catch-pawl 223 acts in the manner describedto maintain the pawl 89 out of engagement' with the rack surface 59 until, as the slide 8'lapp'roaches its lowest position, the up per part of the cam piece 93 engages the lower side of the tooth 225 so that further downward movement of the slide 8'I causes the catch-pawl 223 to be rocked against its spring 229 sufficiently to allow the tooth 225 to ride above the pawl 89 and onto the top thereof so that the pawl 89 may move into engagement with the cam piece 93. The cam piece 93 holds the pawl 89 out of engagement with the rack teeth 59, as aforementioned, when the machine is running continuously, the pawl 89 then being idle and not acting on thehorn actuating parts, said pawl. being brought into operation only when the clutch treadle- I9 is released and the machine is being brought to its stopped position.

Should the clutch vtreadle Iii be depressed when the safety handle I95 occupies a more or less vertical position, then, although the'trip lever I43 is thereby rocked in a clockwise direction sufiiciently to free the spring pressed slide I'II carried thereby from the abutment I99 on the brake cam lever I93, the member I99 now is in such a position with regard to the stud I41 that, the abutment surface 295 on the arm 29I being relatively distant from the stud I47, the lever H3 is unable to rotate sufl'iciently far in a clockwise directionunder theaction of the spring 201 to allow the friction clutch to engage. Moreover, since the eccentric pin I89 on the stub shaft I8! of the safetyihandle Inow occupies a position to the left of the axis of the stub shaft I91} what little clockwise movement of the lever I13 can execute under the action of the spring 29'! will insure that the brake rim I91 is not in engagement with the periphery of the brake cam. When the safety handle I85 occupies its more or less vertical position, therefore, depression of the clutch treadle I9 does not cause the clutch to engage, but in every other respect the depression has effectively the same result as it has when the safety handle I95 is in its substantially 'horizontalposition; the machine may thus be as new and desire to secure by Letters Paten of the United States is:

1. In a fastening inserting machine, the combinaticn of a work support, means tending constantly to elevate the work support into a work clamping position, power operated mechanism arranged toflmove the work support away from operative position while the machine is coming to rest and to maintain said support in this lata treadle for starting the operation of the machine, and means operated directly by said treadle as it starts the operation of the machine forcausing said power operated mechanism to ter position while the, machine remains at rest,'

mit said elevating means to return the work support immediately to work clamping position.

2. In a fastening inserting machine, the com- *binationoi a worksupport, means tending constantly to elevate the work support into a work clamping position, mechanism arranged to lower the work support from work clamping position as the machine is coming to a stop and to maintain the support in this lcwered position while the machine at rest, a camfor actuating said mechanism, a treadle for starting the machine, and means arrangedtobe operatedv before the machine has started for releasing said lowering 5f: mechanism'irom the control of said cam substantially simultaneously with the starting of the machine, thereby permitting said elevating means to return the work support to work clamping'position. l 3.- In a fastening inserting machine, the'combination of a work support, means arranged to movethe work support into workclarnping position, mechanism including-a pivoted latch for removingthe work support a predetermined distance away from work clamping posit on as the machine is coming to rest andfor holding said support in its removed position to permit the work to be taken from said support, a cam for operating. said mechanism, a clutch, a treadle arranged to actuate said clutch, and -means for releasing said latcht-o free the work support from thecontrol'of said cam simultaneously with theiactuation of said clutch; i

4. Ina fasteninginsertingmachine, the combinationiof a horn, means tending constantly to elevatethe horn into a work clam-ping position, mechanism for lcwering'the horn whenthemachine comes to rest and for holding it in' a loweredposition, a latch for connecting the horn to wsaid lowering mechanism, a treadle arranged to trip the machinaand means operated manually by depression of said treadle for releasing said latch and freeingthe hornfrorn said lowering mechanism as the machine is tripped, thereby 5 permitting the horn to be raised by its elevating meansinto work clamping position substantially simultaneously with the actuation of the machine.

5. In a fastening inseting machine, the com 5 -bination oi'a hornarranged dur ng operation of the machine to be urged constantly into a work clamping position, mechanism for moving the horn awayfrom work clamping position when the machine comes to rest and. for holding it 55 away from said position to permit the removal of the work, a clutch for operating the machine, I

a treadle for actuating said clutch, and means operated by said treadle prior the actuation of said clutch for releasing the mechanism 0 which holds the horn away from work clamping position as the clutch is actuated and thereby permitting said horn to be returnedto said work clamping position substantially simultaneously with the starting of the machine by the actua- 65 tion of said clutch.

6. In a fastening inserting machine, the combination of a horn, a spring tending constantly to elevate the horn into a work clamping position, mechanism including a latch arranged to 70 lower the horn away from work clamping posil tion as the machine comes to rest and to main-,

' tain the horn in its lowered position while the machine remains at rest, power operated means arranged to actuate said mechanism, a treaolle 75 for causing said power operated means to oper ate; means for. releasing said latch to free the horn-from: the." control of said horn lowering mechanism and thereby permit said spring to 1'eturn the horn to itswork clamping position, and means including a pivotedmember for preventing said horn lowering mechanism from acting upon the'horn'until thelmachine is again coming to rest.

7. Inc, fastening inserting machine, the combinationof a horn, a spring tendingconstantly to elevate the horn into a work clamping position, a vertically movable member, connections between said member and said horn whereby elevation of said member lowers the horn away from work clamping position, mechanism'fo elevating said member and maintaining it in elevated position as the machine comes to rest, and means for releasing said member, thereby permitting saidspring to elevate the horn again into work clamping position. i l

8: In a fastening inserting machine, the com 1 bination' of a horn for supporting a work piece,

a spring tending. constantly to elevate the horn into a: position to clamp the work piece, a vertically movable plate, connections between said plate and saidhorn whereby elevation of the plate will'lower the horn away from work clamping position, power operated mechanism for elevatingsaid plate and maintaining it in elevated position as the machine comes to rest thereby lowering said, horn, and means for releas ng said plate coincidently with the starting of the Inachinetopermit said spring to elevate the horn into work clamping position substantially simultaneously with thegstarting of the machine.

bi aticn of a horn, a spring tendingconstantly toelevate the horn into a work clamping position,

a ye. llymovable member, connections between said member and the horn whereby elevation of said member lowers the horn and vice \In a fastening inserting machine, the 0031-,

verse, a siide adjacent to said member and arand return the horn to its elevated work clamping position.

10. In a fastening inserting machine, the combination of a horn, a spring tending constantly to elevate the horn into a work clamping positicn, a vertically movableplate, connections between the plate and said horn whereby elevation of the plate lowers the horn, a slide adjacent to said plate and arranged for vertical sliding movement, a latch for connecting the slide and plate 1 to each other, mechanism for elevating the slide and plate while'so connected and while the machine is coming to rest, thereby lowering the horn away from work clamping position as the ma chine comes to rest, a treadle for starting the machine, means operated by saidtreadle for unlatching the slide and plate as the treadle is depressed to start the machine, and a member forhol-ding said latch out of operative position until. the machine is again coming to rest.

11. In a fastening inserting machinathe combination of a horn, a spring urging said horn into an elevated work clamping position, a vertically movable member, connections between said member and said horn whereby elevation of the member lowers the horn and vice versa, mechanism for elevating said member a predetermined distance as the machine comes torest, thereby lowering'the horn from work' clamping position,

into its work clamping position, thereby returning the horn to said work clamping position as said power means starts the operation of the machine.

12. In a fastening inserting machine, the combination of a horn, a spring tending constantly to raise the horn into a work clamping position,

a vertically movable plate having rack teeth thereon, a pivoted lever connected at one side of its pivot to said horn and at the other side to said plate so that movement of the plate in one direction moves'the horn in an opposite direction and vice versa, a slide adjacent to said plate and movable vertically with respect thereto, a pawl carried by said slide and adapted to engage the rack teeth on the plate, thereby connecting the slide and plate, power operated mechanismfor elevating the slide as the machine comes to rest,

thereby elevating the plate and lowering the horn away from work clamping position, said mechanism being arranged to maintain theslide in said elevated position while the machine remains at rest, a clutch for operating the machine, a treadle arranged to operate said clutch, and means connected to said treadle for disconnecting the pawl from said rack teeth as the treadle is depressed to actuate the clutch and thereby permitting the spring to return the horn to work clamping position as the machine starts, said means comprising a pivoted lever having an arm arranged to engage said pawl and disengage it from said rack teeth, and a rod connecting said lever to the treadle.

'13. In a fastening inserting machine, the combination of an awl for piercing the work to be operated upon, a driver, a work supporting horn,

a spring tending constantly to elevate the horn into position to clamp the work while the awl and driver operate, means for depressing the horn from work clamping position to permit the work to be fed between successive fastenings, mechanism i or lowering the'ho'rn a predetermined distance from said work clamping position after the last fastening has been driven and while the machine is coming to rest and for maintaining said horn in said lowered position while the machine is at rest to permit removal of the work, power operated means for actuating the machine, a treadle for starting the operation of said power operated means, and means operated by said treadle for releasing the horn from its lowering mechanism as the machine starts to operate to permitthe spring to return said horn to its elevated work clamping position simultaneously with the starting of the machine, thereby insuring that the work will be clamped before the awl pierces the work.

14. In a fastening inserting machine, the combination of an awl for piercing the work to be operated upon, a driver, means for actuating the awl and driver, a work supporting horn, a spring tending constantly to elevate the horn into position to clamp the work, a main shaft, power means for rotating said shaft, a cam on said shaft, mechanism actuated by said cam for lowering the horn away from work clamping position against the action of said spring after the final fastening has been driven and while the machine is coming to rest,-said cam utilizing approximately one-third of its rotation in actuating said lowering mechanismand being arranged to maintain said mechanism in its actuated position while the machine is at rest, a treadle for initiating the operation of said powermeans to rotate said main shaft, and means operated by said treadle for releasing the horn from the control of said lowering mechanism and permitting said spring to return the horn to its elevated work clamping position substantially as the main shaft starts to rotate, thereby insuring that the work will be clamped before the awl starts to pierce the work while also permitting said'cam to return the horn lowering mechanism gradually to its initial position and thereby reduce strain on the cam.

HAROLD ERNEST ELLIOTT. 

